a camshaft swap isnt normally done untill other mods have been taken care of with a stcok exhaust and intake the stock cam works fine, you might even lose torque and horsepower,with a agressive cam.
i dont normally recomend digging into the engine untill heads intake and exhaust and gears are done and you have a plan for the whole picture then ask the cam companies what they recomend its hard to keep swapping cams becuase you change your combo.
depending on heads split duration works good if the exhaust side is poor like stock heads but might not work with AFR 205's ect
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89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .
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